Fix sphinx for steering odometry library/controllers (backport #626)

[mergify]

This is an automatic backport of pull request #626 done by Mergify.
Cherry-pick of a3f2a16 has failed:

On branch mergify/bp/humble/pr-626
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit a3f2a16.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   doc/controllers_index.rst

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   ackermann_steering_controller/doc/userdoc.rst
	deleted by us:   bicycle_steering_controller/doc/userdoc.rst
	deleted by us:   steering_controllers_library/doc/userdoc.rst
	deleted by us:   tricycle_steering_controller/doc/userdoc.rst

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

---

Mergify commands and options

More conditions and actions can be found in the documentation.

You can also trigger Mergify actions by commenting on this pull request:

• @Mergifyio refresh will re-evaluate the rules
• @Mergifyio rebase will rebase this PR on its base branch
• @Mergifyio update will merge the base branch into this PR
• @Mergifyio backport <destination> will backport this PR on <destination> branch

Additionally, on Mergify dashboard you can:

• look at your merge queues
• generate the Mergify configuration with the config editor.

Finally, you can contact us on https://mergify.com

[christophfroehlich]

this will need #624 first

[mergify]

This pull request is in conflict. Could you fix it @mergify[bot]?

[christophfroehlich]

@Mergifyio rebase
would be necessary

[mergify]

rebase

❌ Command disallowed due to command restrictions in the Mergify configuration.

• any of:
  • sender-permission>=write
  • sender={{author}}

[destogl]

@Mergifyio rebase

[mergify]

rebase

❌ Base branch update has failed

Git reported the following error:

Rebasing (1/1)
Auto-merging ackermann_steering_controller/doc/userdoc.rst
CONFLICT (add/add): Merge conflict in ackermann_steering_controller/doc/userdoc.rst
Auto-merging bicycle_steering_controller/doc/userdoc.rst
CONFLICT (add/add): Merge conflict in bicycle_steering_controller/doc/userdoc.rst
Auto-merging doc/controllers_index.rst
Auto-merging steering_controllers_library/doc/userdoc.rst
CONFLICT (add/add): Merge conflict in steering_controllers_library/doc/userdoc.rst
error: could not apply b40037d... Fix sphinx for steering odometry library/controllers (#626)
hint: Resolve all conflicts manually, mark them as resolved with
hint: "git add/rm <conflicted_files>", then run "git rebase --continue".
hint: You can instead skip this commit: run "git rebase --skip".
hint: To abort and get back to the state before "git rebase", run "git rebase --abort".
Could not apply b40037d... Fix sphinx for steering odometry library/controllers (#626)

err-code: EEA12